I haven't got into this yet, my car has been great and hasn't even shown a check engine light yet. But, (on an '89) what software and cable would be best for me should I want to check for codes and look to see if i'm getting any knock counts and such?? What all can I look at? I have pcmforless do the tune and I don't think I want to get into making my own tunes, but it would be nice to see how well it is working and if I need to send it in for an adjustment or not.

Not trying to thread steal, just thought this info would be best added to this thread instead of having a whole separate one. Keeping good info on a subject gathered together somewhat.